Respuesta :

It’s the last option.
Hope this helps

Answer:

12y^6−36y^5+42y^2 ( the first one)

Step-by-step explanation:

all you need to do is distribute like -6y^2 times -2y^4, -6y^2 times 6y^3, and lastly -6y^2 times -7

I hope its helps

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